How to set the Row Height of a JTree with Java?

To set the row height of a JTree, use the setRowHeight() and as a parameter set the height in pixels −

tree.setRowHeight(25);

The following is an example to set the row height of a JTree with Java −

package my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingDemo {    public static void main(String[] args) throws Exception {       JFrame frame = new JFrame("Demo");       DefaultMutableTreeNode node = new DefaultMutableTreeNode("Project");       DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("App");       DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Website");       DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("WebApp");       node.add(node1);       node.add(node2);       node.add(node3);       DefaultMutableTreeNode one = new DefaultMutableTreeNode("Learning website");       DefaultMutableTreeNode two = new DefaultMutableTreeNode("Business website");       DefaultMutableTreeNode three = new DefaultMutableTreeNode("News publishing website");       DefaultMutableTreeNode four = new DefaultMutableTreeNode("Android app");       DefaultMutableTreeNode five = new DefaultMutableTreeNode("iOS app");       DefaultMutableTreeNode six = new DefaultMutableTreeNode("Editor WebApp");       node1.add(one);       node1.add(two);       node1.add(three);       node2.add(four);       node2.add(five);       node3.add(six);       JTree tree = new JTree(node);       tree.setRowHeight(25);       frame.add(tree);       frame.setSize(550,400);       frame.setVisible(true);    } }

Output